I currently have XING 2208 1800kV motors in my 5 inch ATV. These motors showed a big difference between the XING and XING E series. - Their design allows them to withstand moderate to severe crashes, unlike the E series which seemed to kill an engine or two in minor crashes. The XING 2208 motors survived several falls that I didn't expect the E-Series to survive. The 2208 I drive now I suspect makes a wide range of noise on my azimuth axis. I know a motor has a bad bearing noise that somehow persisted even after changing the bearings. Long story short I bought them to test the performance of both the new XING2 motors and secondly to see if the excessive noise I am experiencing is related to the motors I am currently using. These engines look smooth and I hope they run as good as they are. I will update this review once I have time to test it thoroughly. As there are no reviews for this product yet, I feel compelled to write a review for anyone considering purchasing these motors. keep for updates